<template>
  <HomePanel title="热门品牌" sub-title="国际经典 品质保证" ref="target">
    <template v-slot:right>
      <a :class='{disabled:index===0}' @click="index=0" href="javascript:;" class="iconfont icon-angle-left prev"></a>
      <a :class='{disabled:index===1}' @click="index=1" href="javascript:;" class="iconfont icon-angle-right next"></a>
    </template>
    <div class="box" ref="box">
      <transition>
        <ul v-if='goods && goods.length' class="list" :style="{transform:`translateX(${-index*1240}px)`}">
          <li v-for="item in goods" :key="item.id">
            <RouterLink to="/">
              <img :src="item.picture" alt="">
            </RouterLink>
          </li>
        </ul>
        <!-- 每有数据的时候临时显示骨架屏效果 -->
        <div class='skeleton' v-else>
          <XtxSkeleton class="item" v-for="i in 5" :key="i" animated bg="#e4e4e4" width="240px" height="305px" />
        </div>
      </transition>
    </div>
  </HomePanel>
</template>

<script>
import HomePanel from './home-pannel'
import { useLazyData } from '@/hooks/index'
import { findBrand } from '@/api/home.js'
import { ref } from 'vue'
export default {
  name: 'HomeBrand',
  components: { HomePanel },
  setup() {
    const { goods, target } = useLazyData(() => findBrand(10))
    const index = ref(0)
    // 另一种方法
    // const list = computed(() => {
    //   return goods.value.filter((item, i) => {
    //     if (index.value === 0) {
    //       return i < 5
    //     } else if (index.value === 1) {
    //       return i > 4
    //     }
    //   })
    // })
    return { goods, target, index }
  }
}
</script>

<style scoped lang='less'>
.home-panel {
  background: #f5f5f5;
}
.iconfont {
  width: 20px;
  height: 20px;
  background: #ccc;
  color: #fff;
  display: inline-block;
  text-align: center;
  margin-left: 5px;
  background: @xtxColor;
  &::before {
    font-size: 12px;
    position: relative;
    top: -2px;
  }
  &.disabled {
    background: #ccc;
    cursor: not-allowed;
  }
}
.box {
  display: flex;
  width: 100%;
  height: 345px;
  overflow: hidden;
  padding-bottom: 40px;
  .list {
    width: 200%;
    display: flex;
    transition: all 1s;
    li {
      margin-right: 10px;
      width: 240px;
      &:nth-child(5n) {
        margin-right: 0;
      }
      img {
        width: 240px;
        height: 305px;
      }
    }
  }
}
</style>
